Ideally, doing a save as of the pzgridmodaltemplate rule will result in all the default modal dialogs to reflect the changes you make in one. As a better practice, create your own modal template and refer it on the launch in modal dialog configurations. That way you will not be overriding the default pzgridmodaltemplate.

Also, the previous and add buttons can be removed from the flow action rule itself, if that usecase applies in your case.